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heidelberg.de

Checked 2026-10-21 22:42 UTC · first added 2026-10-21

!Passed with warnings Score 82 of 100

Domain & DNS

warn

20 passed 2 warn 0 failed

Areas

iRegistration iDelegation !Nameservers ✓SOA !DNSSEC iRecords

Problems

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Software version disclosed

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns.uni-heidelberg.de: "9.11.36-RedHat-9.11.36-16.el8_10.16"; dns1.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns3.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns5.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)". Hide or replace the version string.

#17
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Not signed

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

#27

Recent checks

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Full report

Domain & DNS report for heidelberg.de ›

Mail

warn

25 passed 4 warn 0 failed

Areas

✓SPF !DMARC ✓DKIM !DNSSEC !MX !TLS iBIMI

Problems

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Policy: quarantine

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

#4
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Not enabled

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

#8
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Hosts without IPv6

MX · The following MX hosts could not be resolved to IPv6 addresses: mx6.kvnbw.de, mx7.kvnbw.de, mx8.kvnbw.de, mx9.kvnbw.de

#11
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Not configured

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.

#32

Recent checks

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Full report

Mail report for heidelberg.de ›